1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/transmute/main.rs b/src/test/ui/transmute/main.rs
new file mode 100644
index 000000000..cb46fc5ec
--- /dev/null
+++ b/src/test/ui/transmute/main.rs
@@ -0,0 +1,29 @@
+// normalize-stderr-32bit: "`&str` \(64 bits\)" -> "`&str` ($$STR bits)"
+// normalize-stderr-64bit: "`&str` \(128 bits\)" -> "`&str` ($$STR bits)"
+
+use std::mem::transmute;
+
+pub trait TypeConstructor<'a> {
+    type T;
+}
+
+unsafe fn transmute_lifetime<'a, 'b, C>(x: <C as TypeConstructor<'a>>::T)
+                                        -> <C as TypeConstructor<'b>>::T
+where for<'z> C: TypeConstructor<'z> {
+    transmute(x) //~ ERROR cannot transmute between types of different sizes
+}
+
+unsafe fn sizes() {
+    let x: u8 = transmute(10u16); //~ ERROR cannot transmute between types of different sizes
+}
+
+unsafe fn ptrs() {
+    let x: u8 = transmute("test"); //~ ERROR cannot transmute between types of different sizes
+}
+
+union Foo { x: () }
+unsafe fn vary() {
+    let x: Foo = transmute(10); //~ ERROR cannot transmute between types of different sizes
+}
+
+fn main() {}